In your database instance， the user sessions are connected to the database server from the remote machines.You want to achieve the following for these users： 1. The user account must be locked after four unsuccessful login attempts. 2. The user must be prompted to change the password at regular intervals. 3. The user may not have more than three simultaneous sessions. 4. The user session must automatically be logged off if more than 10 minutes elapsed time used. How would you accomplish the above（） By assigning profiles for the users。 By implementing Fine-Grained Auditing （FGA）。 By granting a secure application role to the users。 By implementing the Database Resource Manager pla。
对10kV二级负荷供电，各电气指标实测值偏离额定值的大小，允许为：电压（），频率±0.5Hz，三相电压对称性±5%。
Which statement most accurately describes the implementation of a SQL Access Advisor recommendation?（） SQL Access Advisor recommendations are automatically implemented.。 Individual SQL Access Advisor recommendations can be scheduled for implementation.。 All SQL Access Advisor recommendations for a specific task must be implemented at the same time.。 SQL Access Advisor recommendations are automatically scheduled for implementation during the maintenance window.。 None of the above.。
You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN. Which two statements are correct in this scenario？（） You must ensure that the SALES database is mounted or open.。 You must restore a backup control file to perform a block media recovery.。 You must take the tools01.dbf data file offline before you start a block media recovery.。 You must put the database in NOARCHIVELOG mode to perform a block media recovery.。 You can perform only a complete media recovery of individual blocks； point-in-time recovery of individual data blocks is not supported.。
举例说明影响员工报酬水平的主要因素
按危机来源划分小企业遇到的危机类型，其中不包括（）。
